JPH06303733A - Motor - Google Patents

Motor

Info

Publication number
JPH06303733A
JPH06303733A JP5109875A JP10987593A JPH06303733A JP H06303733 A JPH06303733 A JP H06303733A JP 5109875 A JP5109875 A JP 5109875A JP 10987593 A JP10987593 A JP 10987593A JP H06303733 A JPH06303733 A JP H06303733A
Authority
JP
Japan
Prior art keywords
inner ring
spindle shaft
ball bearing
adhesive
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5109875A
Other languages
Japanese (ja)
Other versions
JP2890159B2 (en
Inventor
Noriyuki Yoshimura
典之 吉村
Yasushi Daikuhara
泰 大工原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minebea Co Ltd
Original Assignee
Minebea Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minebea Co Ltd filed Critical Minebea Co Ltd
Priority to JP5109875A priority Critical patent/JP2890159B2/en
Priority to US08/226,275 priority patent/US5510661A/en
Priority to DE69406340T priority patent/DE69406340T2/en
Priority to EP94302554A priority patent/EP0620633B1/en
Publication of JPH06303733A publication Critical patent/JPH06303733A/en
Application granted granted Critical
Publication of JP2890159B2 publication Critical patent/JP2890159B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1737—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
    • F16D1/068—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving gluing, welding or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/30—Material joints
    • F16C2226/40—Material joints with adhesive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2370/00—Apparatus relating to physics, e.g. instruments
    • F16C2370/12—Hard disk drives or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

PURPOSE:To provide a motor whose revolution accuracy is high by a method wherein the ball bearing inner ring and the spindle shaft of the motor are tightly bonded to each other with a high bonding strength and, even if the ball bearings are extra-small and their inner ring is very thin, the inner ring is not deformed by curing adhesive and hence the accuracy of the ball bearings is not deteriorated. CONSTITUTION:A motor has a spindle shaft 5 and a ball bearing inner ring 8 is fitted onto the spindle shaft 5. A nurled part 16 is formed on the outer circumferential surface of the end part of the spindle shaft 5. The ball bearing inner ring 8 which is fitted onto the knurled part is fixed to the spindle shaft with adhesive 18 provided in the grooves of the knurled part. Further, circumferential trenches 19 are formed continuously to the knurled part and the inner ring is fixed to the spindle shaft with the adhesive flowing into the circumferential trenches.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明に係るモータは主としてＯ
Ａ機器用に使用する。BACKGROUND OF THE INVENTION The motor according to the present invention is mainly composed of O
Used for equipment A.

【０００２】[0002]

【従来の技術】モータのスピンドル軸には、内外輪より
なる玉軸受の内輪を固嵌してあり、スピンドル軸へ嵌め
た内輪をスピンドル軸へ固定するには通常接着剤で次の
ように行っている。2. Description of the Related Art An inner ring of a ball bearing consisting of an inner ring and an outer ring is fixedly mounted on a spindle shaft of a motor. To fix the inner ring fitted on the spindle shaft to the spindle shaft, an adhesive is usually used as follows. ing.

【０００３】(a) 図５(a) のように、スピンドル軸の端
部に形成した面取部と、玉軸受内輪輪の内面側端部に形
成した面取部とで形成したＶ字形円周溝へ接着剤を充填
し、その接着剤をスピンドル軸の外周面と玉軸受内輪の
内周面との間の隙間に流入せしめてスピンドル軸へ玉軸
受内輪を固定させる。この方法では前記Ｖ字形円周溝内
の接着剤がスピンドル軸と玉軸受内輪間に充分に流入せ
ず、ために接着強度にバラツキが生じる欠点がある。(A) As shown in FIG. 5 (a), a V-shaped circle formed by a chamfer formed at the end of the spindle shaft and a chamfer formed at the inner end of the ball bearing inner ring. An adhesive is filled in the circumferential groove, and the adhesive is caused to flow into the gap between the outer peripheral surface of the spindle shaft and the inner peripheral surface of the ball bearing inner ring to fix the ball bearing inner ring to the spindle shaft. This method has a drawback that the adhesive in the V-shaped circumferential groove does not sufficiently flow between the spindle shaft and the inner ring of the ball bearing, so that the adhesive strength varies.

【０００４】(b) 図５(b) のように、スピンドル軸の端
部に小径部を形成し、この小径部と玉軸受内輪との間に
できる周溝へ接着剤を充填してスピンドル軸へ玉軸受内
輪を固定させる。この方法ではスピンドル軸と玉軸受内
輪間の全周の隙間に接着剤が充填されるので、接着強度
は大となるが、玉軸受に超小型のミニチュアベアリング
を使用したばあいには、硬化する接着剤によって玉軸受
内輪が引っ張られ、その結果内輪は変形して真円度が損
なわれ、精度を欠くものとなる。(B) As shown in FIG. 5 (b), a small-diameter portion is formed at the end of the spindle shaft, and a peripheral groove formed between the small-diameter portion and the ball bearing inner ring is filled with an adhesive to form a spindle shaft. Fix the inner ring of the ball bearing. With this method, the adhesive is filled in the gap around the entire circumference between the spindle shaft and the ball bearing inner ring, so the adhesive strength is high, but when a microminiature bearing is used for the ball bearing, it hardens. The adhesive pulls the inner ring of the ball bearing, which results in deformation of the inner ring and loss of roundness, resulting in a loss of accuracy.

【０００５】[0005]

【発明が解決しようとする課題】本発明は上述した従来
の欠点が除去され、玉軸受内輪とスピンドル軸との接着
強度が大で、両者がタイトに固着され、また玉軸受が超
小型で内輪が薄肉のものであっても、硬化する接着剤に
よって変形させられることがなく、したがって玉軸受の
精度が損なわれることがなくて、回転精度の高いモータ
を提供できるようにした。DISCLOSURE OF THE INVENTION The present invention eliminates the above-mentioned drawbacks of the prior art, has a large adhesive strength between a ball bearing inner ring and a spindle shaft, and tightly adheres them to each other. It is possible to provide a motor with high rotation accuracy without being deformed by a hardening adhesive even if the product is thin, and thus without impairing the accuracy of the ball bearing.

【０００６】[0006]

【課題を解決するための手段】本発明に係るモータはス
ピンドル軸を有し、これに玉軸受の内輪を嵌合せしめる
モータにおいて、スピンドル軸の端部外周面にローレッ
ト部を形成し、このローレット部に嵌合せしめた玉軸受
内輪を、その内面とスピンドル軸のローレット部の溝へ
介在せしめた接着剤にてスピンドル軸へ固定せしめたも
のとしてあり、また、ローレット部に続いて円周溝を形
成して、この円周溝へも流入した接着剤にて内輪をスピ
ンドル軸へ固定せしめたものとしてある。A motor according to the present invention has a spindle shaft, and in a motor for fitting an inner ring of a ball bearing to the spindle shaft, a knurled portion is formed on an outer peripheral surface of an end portion of the spindle shaft. The inner ring of the ball bearing that is fitted to the part is fixed to the spindle shaft with an adhesive that intervenes in the inner surface of the ring and the groove of the knurled part of the spindle shaft. The inner ring is formed and fixed to the spindle shaft with an adhesive that also flows into the circumferential groove.

【０００７】[0007]

【作用】スピンドル軸における玉軸受内輪の嵌合部には
ローレット部を刻設してあるので、例えばスピンドル軸
の上端外周縁に塗布した接着剤はローレット部の各溝へ
流入し、ローレット部のほぼ全周面に接着剤層が形成さ
れるので、大なる接着強度で玉軸受内輪がスピンドル軸
に固定される。Since the knurled portion is formed on the fitting portion of the ball bearing inner ring of the spindle shaft, the adhesive applied to the outer peripheral edge of the upper end of the spindle shaft flows into each groove of the knurled portion, and Since the adhesive layer is formed on almost the entire circumferential surface, the ball bearing inner ring is fixed to the spindle shaft with a large adhesive strength.

【０００８】また、玉軸受に超小型のミニチュアベアリ
ングを使用したばあい、スピンドル軸におけるローレッ
ト部の外径を内輪が嵌合し得る嵌合公差のものとするこ
とにより、硬化する接着剤によっても内輪が変形させら
れるようなことはなく、内輪は真円度が保持され、モー
タの回転精度が損なわれることはない。Also, when an ultra-miniature miniature bearing is used as the ball bearing, by setting the outer diameter of the knurl portion of the spindle shaft to a fitting tolerance with which the inner ring can fit, an adhesive that cures may also be used. The inner ring is not deformed, the circularity of the inner ring is maintained, and the rotation accuracy of the motor is not impaired.

【０００９】[0009]

【実施例】以下本発明に係るモータの実施例を添付図面
に示す各具体例により説明する。図１は本発明に係るア
ウタロータ型スピンドルモータを示す。図１において、
符号１はベースたるフランジで、中央部に筒状のヨーク
ホルダ２を設けてあり、ヨークホルダのまわりには、コ
イル３を備えるステータヨーク４を設けてある。Embodiments of the motor according to the present invention will be described below with reference to specific examples shown in the accompanying drawings. FIG. 1 shows an outer rotor type spindle motor according to the present invention. In FIG.
Reference numeral 1 is a flange as a base, and a cylindrical yoke holder 2 is provided in the central portion, and a stator yoke 4 having a coil 3 is provided around the yoke holder.

【００１０】フランジの中心部、より具体的には有底の
ヨークホルダ２の底部中心にはスピンドル軸５の下部を
固定してあり、このスピンドル軸は上部が小径な２段軸
のものとしてある。スピンドル軸の下部大径部の外周に
転動溝６を形成してあり、また小径部には外周に転動溝
７を形成した内輪８を嵌めてある。The lower part of the spindle shaft 5 is fixed to the center of the flange, more specifically, the center of the bottom of the bottomed yoke holder 2, and the spindle shaft is a two-stage shaft having a small upper part. A rolling groove 6 is formed on the outer circumference of the lower large diameter portion of the spindle shaft, and an inner ring 8 having a rolling groove 7 formed on the outer circumference is fitted on the small diameter portion.

【００１１】また、ロータたるハブ９の中央下面に玉軸
受本体用のスリーブ１０をハブと一体に形成し、このス
リーブ１０の内面に、スピンドル軸の大径部転動溝と前
記内輪の転動溝と対応する複列の転動溝１１、１２を形
成して、これら対応する転動溝間にそれぞれボール１
３、１４、内輪７および大径部の転動溝６で玉軸受本体
を構成し、これによりハブがスピンドル軸まわりに回転
できるように保持されており、図中の符号１５は前記ヨ
ークと対応せしめてハブの外周内面に設けた磁石を示
す。Further, a sleeve 10 for a ball bearing body is integrally formed with the hub on the lower surface of the center of a hub 9 which is a rotor, and on the inner surface of the sleeve 10, the large diameter rolling groove of the spindle shaft and the rolling of the inner ring. Double row rolling grooves 11 and 12 corresponding to the grooves are formed, and the balls 1 are respectively provided between these rolling grooves.
3, 14 and the inner ring 7 and the rolling groove 6 of the large diameter portion constitute a ball bearing main body, whereby the hub is held so as to be rotatable around the spindle axis, and reference numeral 15 in the drawing corresponds to the yoke. A magnet provided on the inner surface of the outer periphery of the hub is shown at least.

【００１２】しかして本発明においては、スピンドル軸
の小径部の上端外周縁に面取部を形成するとともに、小
径部の外周面にはローレット部１６を形成して、小径部
上端の面取部と内輪の内周面上端との間に形成される溜
め溝１７に注入した例えば嫌気性の接着剤１８をローレ
ット部の溝へ流入させて乾燥固化せしめることにより内
輪８をスピンドル軸５へ固定せしめてある。However, in the present invention, the chamfered portion is formed on the outer peripheral edge of the upper end of the small diameter portion of the spindle shaft, and the knurled portion 16 is formed on the outer peripheral surface of the small diameter portion to form the chamfered portion at the upper end of the small diameter portion. The inner ring 8 is fixed to the spindle shaft 5 by injecting, for example, an anaerobic adhesive 18 injected into a storage groove 17 formed between the inner ring 8 and the upper end of the inner peripheral surface of the inner ring into the groove of the knurled portion to be dried and solidified. There is.

【００１３】ローレット部１６は図１に示すスピンドル
軸線と平行ないわゆる平目溝タイプのほかに、図３の
(a) のようにスピンドル軸に対して斜交するように形成
した斜め溝タイプのものや、あるいは図３の(b) のよう
に互いに交叉するバイアス目タイプのものもあるが、加
工上は平目溝タイプのものが有利である。The knurled portion 16 is of a so-called flat groove type parallel to the spindle axis shown in FIG.
As shown in (a), there is an oblique groove type that is formed so as to be oblique to the spindle axis, and there is also a bias eye type that intersects with each other as shown in (b) of Fig. 3. The flat groove type is advantageous.

【００１４】また、スピンドルの小径部には前記ローレ
ット部に続いて円周方向の溝１９を形成し、この溝１９
へもローレット部の溝からの接着剤を流入させることに
よりスピンドルと内輪との接着強度をより大ならしめる
ようにしてある。なお、前記内輪には接着剤が凝固する
前に例えば上部からプリロード（予圧）を掛けてスピン
ドル軸の適正位置に固定せしめる。Further, a circumferential groove 19 is formed in the small diameter portion of the spindle following the knurled portion, and the groove 19 is formed.
The adhesive strength between the spindle and the inner ring is further increased by injecting the adhesive from the groove of the knurl portion. Before the adhesive is solidified, a preload (preload) is applied to the inner ring from above so that the adhesive is fixed at an appropriate position on the spindle shaft.

【００１５】図４はインナーロータ型スピンドルモータ
の例を示し、外周にフランジ１を有するステータヨーク
ホルダ２の底部中心に２段軸よりなるスピンドル軸５を
立設してあって、ステータヨークホルダの筒状リブ２ａ
の内周面にステータヨーク４を取り付けてある。FIG. 4 shows an example of an inner rotor type spindle motor in which a spindle shaft 5 consisting of a two-stage shaft is erected at the center of the bottom of a stator yoke holder 2 having a flange 1 on the outer circumference. Cylindrical rib 2a
A stator yoke 4 is attached to the inner peripheral surface of the.

【００１６】この実施例のものでは、玉軸受本体用のス
リーブ１０をハブ９の中央下面にハブと一体に形成して
あり、玉軸受本体の構造は図１の実施例のものと同じで
あるが、磁石はスリーブ１０の外周に設けてある。In this embodiment, the sleeve 10 for the ball bearing main body is integrally formed with the hub on the lower central surface of the hub 9, and the structure of the ball bearing main body is the same as that of the embodiment of FIG. However, the magnet is provided on the outer circumference of the sleeve 10.

【００１７】しかしてこの実施例のものにもスピンドル
軸にはローレット部１６と円周溝１９を形成して、ロー
レット部と円周溝間へ注入せしめた接着剤で内輪をスピ
ンドル軸へ固定せしめてある。However, also in this embodiment, the knurled portion 16 and the circumferential groove 19 are formed on the spindle shaft, and the inner ring is fixed to the spindle shaft with the adhesive injected between the knurled portion and the circumferential groove. There is.

【００１８】図１、図４に示すモータの玉軸受は、ロー
タたるハブのスリーブ１０が玉軸受の外輪を兼ねる出願
人会社の独自創作に係る構造のものであるが、玉軸受に
は単なる内外輪よりなる従来のものを使用するばあいも
ある。The ball bearing of the motor shown in FIGS. 1 and 4 has a structure according to the original creation of the applicant company in which the sleeve 10 of the hub as the rotor also serves as the outer ring of the ball bearing. In some cases, a conventional ring-shaped one is used.

【００１９】なお、上記各実施例におけるフランジの内
面（上面）には前記コイル３と対応せしめたモータ駆動
用のプリント配線基板を設けてあるが、これは図示を省
略した。The inner surface (upper surface) of the flange in each of the above-mentioned embodiments is provided with a printed wiring board for driving a motor which is associated with the coil 3, but this is not shown.

【００２０】[0020]

【発明の効果】本発明においては、玉軸受の内輪が嵌合
しているスピンドル軸のローレット部のほぼ全周に接着
剤層が形成されるので、玉軸受内輪との接着面積が大
で、玉軸受内輪がタイトにスピンドル軸に固定され、回
転振れが生じるおそれがない。According to the present invention, since the adhesive layer is formed on substantially the entire circumference of the knurled part of the spindle shaft with which the inner ring of the ball bearing is fitted, the adhesion area with the inner ring of the ball bearing is large. The inner ring of the ball bearing is tightly fixed to the spindle shaft, and there is no risk of rotational runout.

【００２１】また、玉軸受に超小型のミニチュアベアリ
ングを使用したばい、スピンドル軸におけるローレット
部の外径を内輪が嵌合し得る嵌合公差のものとすること
により、硬化する接着剤によっても内輪が変形させられ
るようなことはなく、内輪は真円度が保持され、回転精
度が損なわれることのないモータを提供できる。In addition, when a microminiature bearing is used for the ball bearing, and the outer diameter of the knurled portion of the spindle shaft is set to a fitting tolerance with which the inner ring can be fitted, the inner ring can also be cured by an adhesive. It is possible to provide a motor in which the circularity of the inner ring is maintained and rotation accuracy is not impaired.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明に係るアウタロータタイプのモータの一
例を示す縦断面図。FIG. 1 is a vertical cross-sectional view showing an example of an outer rotor type motor according to the present invention.

【図２】ローレット部に対する内輪の嵌合部を示す拡大
横断平面図。FIG. 2 is an enlarged transverse plan view showing a fitting portion of the inner ring with respect to the knurled portion.

【図３】ローレット部の例を示す図。FIG. 3 is a diagram showing an example of a knurled portion.

【図４】本発明に係るインナーロータタイプのモータの
一例を示す図。FIG. 4 is a diagram showing an example of an inner rotor type motor according to the present invention.

【図５】スピンドル軸に対する内輪嵌合部の従来の例を
示す図。FIG. 5 is a view showing a conventional example of an inner ring fitting portion for a spindle shaft.

【符号の説明】[Explanation of symbols]

１ フランジ ２ ヨークホルダ ２ａ 筒状リブ ３ コイル ４ ステータヨーク ５ スピンドル軸 ６、７ 転動溝 ８ 内輪 ９ ハブ １０ スリーブ １１、１２ 転動溝 １３、１４ ボール １５ 磁石 １６ ローレット部 １７ 溜め溝 １８ 接着剤 １９ 円周溝 1 Flange 2 Yoke Holder 2a Cylindrical Rib 3 Coil 4 Stator Yoke 5 Spindle Shaft 6 and 7 Rolling Groove 8 Inner Ring 9 Hub 10 Sleeve 11 and 12 Rolling Groove 13 and 14 Ball 15 Magnet 16 Knurled Part 17 Retaining Groove 18 Adhesive 19 Circumferential groove

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】スピンドル軸を有し、これに玉軸受の内輪
を嵌合せしめるモータにおいて、スピンドル軸の端部外
周面にローレット部を形成し、このローレット部に嵌合
せしめた玉軸受内輪を、その内面とスピンドル軸のロー
レット部の溝へ介在せしめた接着剤にてスピンドル軸へ
固定せしめてなるモータ。1. A motor having a spindle shaft into which a ball bearing inner ring is fitted, wherein a knurled portion is formed on the outer peripheral surface of the end of the spindle shaft, and a ball bearing inner ring fitted into the knurled portion is formed. , A motor that is fixed to the spindle shaft with an adhesive that is interposed between the inner surface and the groove of the knurled portion of the spindle shaft. 【請求項２】スピンドル軸を有し、これに玉軸受の内輪
を嵌合せしめるモータにおいて、スピンドル軸の端部外
周面にローレット部を形成するとともにローレット部に
続いて円周溝を形成し、前記ローレット部と円周溝にか
けて嵌合せしめた玉軸受内輪を、その内面とスピンドル
軸のローレット部の溝及び前記円周溝へ介在せしめた接
着剤にてスピンドル軸へ固定せしめてなるモータ。2. A motor having a spindle shaft, in which an inner ring of a ball bearing is fitted, a knurled portion is formed on an outer peripheral surface of an end portion of the spindle shaft, and a circumferential groove is formed following the knurled portion. A motor in which a ball bearing inner ring fitted over the knurled portion and the circumferential groove is fixed to the spindle shaft with an adhesive which is interposed between the inner surface of the ring and the knurled portion of the spindle shaft and the circumferential groove.
JP5109875A 1993-04-13 1993-04-13 Spindle motor for office automation equipment Expired - Fee Related JP2890159B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP5109875A JP2890159B2 (en) 1993-04-13 1993-04-13 Spindle motor for office automation equipment
US08/226,275 US5510661A (en) 1993-04-13 1994-04-11 Motor
DE69406340T DE69406340T2 (en) 1993-04-13 1994-04-12 Motor with a stepped shaft and an inner ball bearing ring, which is attached to a knurled shaft section with adhesive
EP94302554A EP0620633B1 (en) 1993-04-13 1994-04-12 Motor with a stepped shaft and a bearing inner race fixed to a knurled portion of the shaft by an adhesive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5109875A JP2890159B2 (en) 1993-04-13 1993-04-13 Spindle motor for office automation equipment

Publications (2)

Publication Number Publication Date
JPH06303733A true JPH06303733A (en) 1994-10-28
JP2890159B2 JP2890159B2 (en) 1999-05-10

Family

ID=14521399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5109875A Expired - Fee Related JP2890159B2 (en) 1993-04-13 1993-04-13 Spindle motor for office automation equipment

Country Status (4)

Country Link
US (1) US5510661A (en)
EP (1) EP0620633B1 (en)
JP (1) JP2890159B2 (en)
DE (1) DE69406340T2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10225047A (en) * 1997-02-04 1998-08-21 Asmo Co Ltd Bearing structure of motor
JP2010065761A (en) * 2008-09-10 2010-03-25 Sii Micro Precision Kk Rolling bearing unit

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4121428A1 (en) * 1991-06-28 1993-01-07 Papst Motoren Gmbh & Co Kg SPINDLE MOTOR, ESPECIALLY FOR DISK STORAGE
JPH0956110A (en) * 1995-08-09 1997-02-25 Minebea Co Ltd Motor with composite bearing unit
US5841210A (en) * 1995-08-09 1998-11-24 Minebea Kabushiki-Kaisha Electric drive motor with a compound bearing assembly
JPH09112546A (en) * 1995-10-20 1997-05-02 Minebea Co Ltd Hard disk driving device furnished with complex bearing device
JP3136278B2 (en) * 1997-02-14 2001-02-19 ミネベア株式会社 motor
US5798888A (en) * 1997-04-09 1998-08-25 Iomega Corporation Disk hub for a removable cartridge and spindle motor for using same
JP2001268875A (en) * 2000-03-16 2001-09-28 Minebea Co Ltd Spindle motor
JP2001327118A (en) 2000-05-11 2001-11-22 Nsk Ltd Motor
JP2002034198A (en) * 2000-07-18 2002-01-31 Minebea Co Ltd Spindle motor
JP3740375B2 (en) 2001-02-27 2006-02-01 株式会社日立製作所 AC generator for vehicles
US20050188951A1 (en) * 2004-02-27 2005-09-01 Borgwarner Inc. Press-fit shaft and method
US7574797B2 (en) * 2004-07-22 2009-08-18 Ford Global Technologies, Llc Throttle body and method of assembly
US7615903B2 (en) * 2006-04-27 2009-11-10 Gm Global Technology Operations, Inc. Structural support member for electric motor/generator in electromechanical transmission
US20100024225A1 (en) * 2008-08-01 2010-02-04 Wackwitz Jeffrey M Band saw blade

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6336919U (en) * 1986-04-17 1988-03-09
JPH0421337A (en) * 1990-05-15 1992-01-24 Shibaura Eng Works Co Ltd Electric motor
JPH04183241A (en) * 1990-11-13 1992-06-30 Asmo Co Ltd Spindle motor and assembling method of rotary shaft thereof

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS613852Y2 (en) * 1977-11-26 1986-02-06
DE3617989A1 (en) * 1986-05-28 1987-12-03 Mulfingen Elektrobau Ebm ASYMMETRIC ELECTRIC MOTOR
US4741091A (en) * 1986-08-12 1988-05-03 Dayco Products-Eaglemotive, Inc. Clutch for a cooling fan of a motor vehicle and method of making the same
US4694213A (en) * 1986-11-21 1987-09-15 Ferrofluidics Corporation Ferrofluid seal for a stationary shaft and a rotating hub
FR2612268A1 (en) 1987-03-13 1988-09-16 Saint Martin Francois Modification to surfaces participating in bonding rolling-contact bearings or bearing bushes into bearings and/or onto shafts
JPH0678769B2 (en) * 1987-04-13 1994-10-05 石川島播磨重工業株式会社 Ceramic bearing mounting structure
SU1669049A1 (en) * 1988-04-08 1991-08-07 Специальное Проектно-Конструкторское И Технологическое Бюро Электродвигателей Производственного Объединения "Укрэлектромаш" Method of assembly of bearing unit of motor
US5045738A (en) * 1989-02-22 1991-09-03 Nippon Densan Corporation Spindle motor
JPH0720362B2 (en) * 1989-10-31 1995-03-06 日本精工株式会社 Electric motor for hard disk drive
US5138209A (en) * 1990-03-01 1992-08-11 Nippon Densan Corporation Spindle motor
JPH05207718A (en) * 1992-01-24 1993-08-13 Nippon Densan Corp Dc motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6336919U (en) * 1986-04-17 1988-03-09
JPH0421337A (en) * 1990-05-15 1992-01-24 Shibaura Eng Works Co Ltd Electric motor
JPH04183241A (en) * 1990-11-13 1992-06-30 Asmo Co Ltd Spindle motor and assembling method of rotary shaft thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10225047A (en) * 1997-02-04 1998-08-21 Asmo Co Ltd Bearing structure of motor
JP2010065761A (en) * 2008-09-10 2010-03-25 Sii Micro Precision Kk Rolling bearing unit

Also Published As

Publication number Publication date
JP2890159B2 (en) 1999-05-10
US5510661A (en) 1996-04-23
EP0620633A1 (en) 1994-10-19
DE69406340T2 (en) 1998-02-26
DE69406340D1 (en) 1997-11-27
EP0620633B1 (en) 1997-10-22

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